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RESISTANCE METER

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1. Slide the Battery Buss Cut Off to the ON position This connects the 9V batteries to the instru ment s circuitry Rev C January 2012 23 PRS 812 Resistance Meter NOTE Slide the Battery Buss Cut Off to the OFF position when the instrument is not in use particu larly during storage and transport to prevent unintentional instrument power up and during battery replacement 3 Press the Red ON OFF button to power up the instrument 4 The instrument will conduct a self test check its LCD display and LED lights and test the batter ies If Batteries are acceptable GOOD will be displayed in the LCD Figure 9 434587891 11121 afia pn a 10 RESISTANCE put MANUAL RESISTANCE EE 71 am uncrion RANGE SELECTION Funcrion 7 RAMGESELECTION Secr EJ E a E3 PRS 812 Resistance Meter PRS 812 Resistance Meter T nz E XE F STAT Figure 9 PRS 812 Power Up tests display circuits LED indicators and batteries 5 AUTO is displayed in the LCD a The default Mode for the PRS 812 is Automatic Resistance Measurement in exponential format 1 0EXX b If measurements are to be displayed in Ohms press the Gray MODE button once 6 If REC is not displayed in the lower left corner of the Liquid Crystal Display LCD press Gray RECORD RECALL button once to display REC in LCD This activates the Memory Register en abling data storage 7 Press the Green TEST button to begin the AUTOMAT
2. Very carefully place a flat head screwdriver between the battery terminals and gently lift the bat tery cover from the battery Rev C January 2012 15 PRS 812 Resistance Meter F Properly dispose of any old batteries G Position the new alkaline battery under the battery cover H With your thumb press the terminals in place one at a time l Carefully wind any excess battery lead around the battery terminal below the cap To avoid instru ment damagae do not pull battery connection leads J Place the batteries back into position with the battery terminal covers facing the lead spurce within the battery case shown in figure 4 K Carefully position the instrument battery cover back into place without force L Replace the battery cover screws M Slide battery buss switch to the ON position Following the above directions for battery replacement will insure that you do not damage the battery covers or wires during this process NOTE It is recommended to measure the voltage of each battery with a multimeter If the voltage of one battery measures at or below 6 75 volts replace that battery If both batteries measure at or below 6 75 volts replace both batteries V Setup amp Calibration A Setting up the PRS 812 for low resistance range calibration 1 Position Battery Buss Cut Off switch to OFF position 2 To install batteries remove two Phillips locking screws and cover Attach two Long Life Alkaline 9V bat
3. b LCD displays GOOD if battery voltage suitable for instrument operation displays Lo if bat teries require replacement c Instrument ends startup sequence in default AUTO Exponent Display Mode 1 0EXX 3 Select Function Mode if other than AUTO Exponent Display Mode 1 0EXX is desired by press ing MODE button 4 Perform low resistance range calibration after 3 minute instrument warm up if desired a Install Calibration Shunt between positive and negative terminals b Press RESET then CLEAR within second 18 Rev C January 2012 g h PRS 812 Resistance Meter CAL is displayed in LCD Press RESET to calibrate instrument to shunt reference Press TEST to measure shunt resistance of 1 02 0 02 ohms Q Press RESET button to prepare instrument for the next measurement Repeat calibration procedure if necessary Remove Calibration Shunt 5 Carefully connect test leads to positive Power and negative Sensing terminals Insert right angle sleeved banana into instrument terminal press gently while twisting into position Standard 10 foot test leads are used for general audit measurements and provides excellent accuracy up to 1 0x10 ohms 6 Connect test leads to electrodes fixture or circuit to be measured 7 Press Green TEST button to initiate Automatic measurement Test Cycle a The resistance range is reset to minimum 0 1Q It is automatically adjusted in conjunction with the resistance character
4. sufficient prior to completing the calibration sequence 4 Press MODE once to shift display to ohms mode Q 5 Press the Yellow RESET then the Gray CLEAR button within second The message CAL will be displayed in the LCD See Figure 8 6 Press the Yellow RESET button to complete low range 0 1 to 10 ohm calibration The CAL mes sage will automatically be cleared when RESET is pressed See Figure 8 7 Press the Green TEST button Indicated resistance should be 1 02 0 02 ohms as shown in Figure 8 Press RESET to clear the display NOTE If 1 02 0 02 ohms is not displayed repeat the calibration process Rev C January 2012 17 PRS 812 Resistance Meter 8 Remove the calibration shunt assembly from the lead terminals 9 The PRS 812 is now ready for wide range measurements from 0 1 to 1 0E 12 Ohms PRS 812 Re Ic REM CU Figure 8 Complete Calibration Sequence by Pressing RESET To confirm Calibration Press TEST to measure the Calibration Shunt resistance Shunt resistance should display 1 02 Ohms 0 02 Ohms VI Instrument Operation A Overview of PRS 812 Operation amp Measurement Test Cycle Sequence The following 10 points provide a general overview for calibrating and using the PRS 812 for resis tance measurements 1 Slide Battery Buss Cut Off switch to ON 2 Press Red ON OFF button once to power up PRS 812 a Instrument performs circuit check and tests LED s LCD display and battery voltage
5. Cycle displays and HOLDS final resistance measure ment test voltage order of magnitude LED analog scale amp multiplier and electrification time at end of electrification period L The Memory Register Data Logging and Calculation As previously described the PRS 812 Resistance System will acquire and store up to 80 measure ments or data points in its Memory Register when Record REC is activated Data is entered in memory each time the RESET button is pressed following a measurement The data in memory can be reviewed for its minimum maximum and average values by pressing the RECALL button 1 To Activate the Record Mode press the gray RECORD RECALL button once REC will be dis played in the lower left corner of the instrument s LCD display 2 To Review Data in the Memory Register press the RECORD RECALL button four times as fol lows a 1st Press RECORD RECALL Provides access to data points in the Memory Register 1 2 3 4 Use UP 45 and DOWN 4L arrow keys to scroll through data You may select a data point and eliminate it by pressing CLEAR All other stored data will shift one slot in the register to replace deleted data Min Max and Average of remaining data in Memory will be recalculated Press RECORD RECALL to proceed or RESET to exit Memory Register and return to normal operations Rev C January 2012 PRS 812 Resistance Meter OPERATIONAL NOTE You may return the instrument to
6. Than 2 0x10 ohms 1 If the measurement is greater than 2 0x10 ohms the test voltage will remain at 100 volts and the resistance range will be adjusted until the upper range is exceeded 2 OL Over Level will be displayed in the LCD and the gt 14 LED will be energized 3 Oncethe instrument confirms a stable measurement if any HOLD will be displayed in the LCD and the electrification timer will stop If a stable measurement cannot be obtained at this range OL will be displayed J Resistance Measurements in MANUAL MODE of Operation To select MANUAL in either Exponential Mode 3 or Ohms Mode 4 Display use the FUNCTION MODE button to toggle through choices Manual is used for a variety of applications where one desires to override Automatic functions gt Measurement series where magnitude is in a defined decade and test voltage is fixed gt When an extended electrification period may be desired gt Manual selection of test voltage for measurements not used with Automatic settings The following summarizes MANUAL MODE Operations and assumes test leads are installed 1 Slide Battery Buss Cut Off switch to ON position 2 Press Red ON OFF button once to power up the instrument 3 Select MANUAL MODE by pressing the MODE button until MANUAL appears in the LCD a Pressing MODE button two 2 times selects MANUAL Exponential display 1 0EXX b Pressing the MODE button three 3 times selects MANUAL display in Ohms 4 Set RES
7. flammable areas G Do not attempt to measure energized circuits with the PRS 812 H Do not use the PRS 812 if it becomes damaged in any way l Only Prostat trained instrument personnel should attempt to service or repair the PRS 812 J Other Safety amp Operating Considerations 1 This manual displays cautions and warnings alerting the user to hazardous operation and ser vicing conditions CAUTION or WARNING headings throughout this publication flag this infor mation where appropriate Follow all caution and warning instructions at all times 2 The PRS 812 is a precision instrument and should be operated by experienced personnel famil iar with the use and handling of devices containing power supplies CAUTION The PRS 812 Contains Electrostatic Discharge Sensitive ESDS components and includes precision alignment of circuit elements Only Prostat trained and ESD Qualified instrument repair personnel should perform service 3 The PRS 812 contains Electrostatic Discharge Sensitive ESDS components Qualified personnel should service it only at ESD Controlled workstations Do not attempt to dismantle the PRS 812 8 Rev C January 2012 PRS 812 Resistance Meter without Prostat s authorization and expert supervision The instrument contains exceptionally clean circuits that are aligned and adjusted in a precise manner for optimal operation and ac curate performance Unauthorized opening of the PRS 812 housing will
8. ohm to 1 0x10 ohms 200 TQ Automatic Electrification Period timing based on the instrument s measurement capabili ties and industry standards for measurement of ESD controlled materials In AUTOMATIC Modes the PRS 812 performs the following functions during the Measurement Test Cycle once the TEST button is pressed m Resets the RESISTANCE RANGE to minimum i e 0 10 Sets TEST VOLTAGE to 10 volts millivolts and applies initial voltage to material under test Resets the ELECTRIFICATION PERIOD timer to O seconds then starts timer During Measurement Test Cycle a Automatically adjusts RESISTANCE RANGE in accordance with material resistive characteris tics b Automatically adjusts TEST VOLTAGE in accordance with material resistive characteristics and industry standards c Automatically adjusts ELECTRIFICATION PERIOD in accordance with material resistive char acteristics and industry standards At completion of Test Cycle displays and HOLDS final resistance measurement test voltage order of magnitude LED analog scale amp multiplier and electrification time at end of electrifi cation period D General Automatic Mode Procedures 1 2 Attach the desired test leads to the fixture electrodes or points to be measured NOTE The standard Prostat 10 foot test leads are intended for measurements up to the 10 ohm range This is the maximum range of the PRS 812 for precision resistance measurements
9. terminal for supplying Test Voltage to fixture or material under test Sensing Terminal for measurement of current I through fixture or material under test Rev C January 2012 PRS 812 Resistance Meter Battery Compartment Located in lower section of case opposite LCD display Holds two 9V transistor batteries Two screws secure the battery cover Note Use only Long Life Alkaline Batteries Remove batteries when instrument is not in use for long periods of time Cover 7 Screws Battery Buss Switch MUST be off during battery change Figure 3 Opening Battery Compartment Figure 4 Install 2 each 9V Alkaine Batteries IV Battery Installation See Figures 3 amp 4 For optimal battery life and avoid instrument damage always replace the batteries with high energy alkaline batteries Failure to do so will result in a diminished battery life measurement error and potential instrument damage that could void the warranty The battery caps on the instruments you have purchased are designed to fit snugly Please follow the di rections below for safe replacement of batteries A B Slide battery bus switch to the OFF position see figure 3 Carefully remove the battery cover from the instrument Gently take the batteries from the battery compartment Unwind any battery lead that is wrapped around the top of the battery terminal Do not pull bat tery connection leads this could cause instrument damage
10. the LCD c Pressing RESET will stop the Measurement Test Cycle and simultaneously 1 Turn Test Voltage power supply OFF 2 Save the displayed measurement in the Memory Register 3 Add one data point to the MEM XX counter and display total number of data points in the Memory Register e g MEM 05 4 Prepare the instrument for the next measurement using the same Manual settings 5 Pressing TEST will start a new Measurement Test Cycle 7 If the resistance you are measuring is higher than the selected decade OL Over Level will be displayed To move the selected resistance range up to a higher decade a Press RESET once to stop the Test Cycle This does not add OL to Memory b Press MANUAL RESISTANCE RANGE SELECTION up arrow f to select the desired decade the appropriate LED will illuminate indicating the current selection 28 Rev C January 2012 PRS 812 Resistance Meter C Press TEST to restart the Test Cycle d Repeat the RESET Resistance Range adjustment and TEST sequence until a stable measure ment is displayed 8 Ifthe resistance is lower than the selected decade UL Under Level will be displayed To move the selected resistance range down to a lower decade a Press RESET once to stop the Test Cycle This does not add UL to Memory b Press MANUAL RESISTANCE RANGE SELECTION down arrow 4L to select the desired de cade the appropriate LED will illuminate indicating the current selection C Press TES
11. the MODE select button until AUTO and MANUAL appear in the LCD display a Pressing the MODE button four 4 times selects AUTOMATIC MANUAL Exponential dis play 1 0EXX b Pressing the MODE button five 5 times selects AUTOMATIC MANUAL display in Ohms 4 Set RESISTANCE RANGE SELECTION using the UP 1 and DOWN J arrow keys Rev C January 2012 29 PRS 812 Resistance Meter 30 a Range selection is made in one decade increments and indicated with illuminated LED s b For resistance ranges below E03 use the LCD displayed decimal point for setting the desired decade The 3 LED will be illuminated 5 Pressthe Green TEST button to begin the AUTOMATIC MANUAL Measurement Cycle a The instrument will automatically start the Test Cycle from the selected resistance range decade b Initial Test Voltage for the selected resistance decade will be applied For example if the 10 ohms decade was selected initial Test Voltage will be 100 Volts c Atthis point the PRS 812 s AUTOMATIC Mode takes control of the Measurement Test Cycle 1 2 3 4 Automatically re adjusts RESISTANCE RANGE in accordance with material resistive characteristics Automatically re adjusts TEST VOLTAGE in accordance with material resistive characteristics and industry standards Automatically re adjusts ELECTRIFICATION PERIOD in accordance with mate rial resistive characteristics and industry standards At completion of Test
12. void the instrument s warranty WARNING Unauthorized opening of the PRS 801 case or dismantling in any manner WILL VOID THE INSTRUMENT S WARRANTY 4 Read this manual in its entirety before installing batteries or using the PRS 812 5 Do not drop or cause unnecessary mechanical shock to your PRS 812 instrument 6 Store the instrument in a clean dry environment Do not expose the instrument to wet ex tremely hot or cold conditions 7 Iftheunit is stored in a cold environment allow it to stabilize at room temperature before powering up the unit This will prevent damage due to condensation that may accumulate on the instrument s circuit boards Ill Controls Connections amp Indicators Before operating the PRS 812 instrument become familiar with each control and display function A thorough understanding of the instrument s operation will make its use a pleasant experience en hance measurement accuracy avoid mistakes and prolong the life of the instrument PRS 812 CONTROLS 1 FUNCTION MODE Toggles Through Six Operation Modes 1 AUTO AUTOMATIC displays data in exponential format 1 0EXX NOTE AUTO in exponential format e g 1 3E05 is the Default start up mode when the instrument is turned ON 2 AUTO AUTOMATIC displays data in O KO MO GO and TO The instru ment controls resistance ranges test voltage and electrification periods in AUTOMATIC mode Rev C January 2012 9 PRS 812 Resistance M
13. IC measurement sequence The instru ment will automatically set the resistance range to 0 1 Ohms 1 0E 01 and select 10 volts to be applied to the Positive Lead Terminal The electrification timer will start counting sec onds E Measurements Less than 10 000 ohms 1 0x10 ohms 1 When the resistance measurement is less than 1 0x10 ohms test voltage will remain at 10V the resistance range will be adjusted automatically and a stable resistance measurement will be obtained within 2 0 to 3 0 seconds 2 Oncea stable measurement is confirmed and displayed by the instrument HOLD will be ener gized in the LCD and the electrification timer will stop 24 Rev C January 2012 PRS 812 Resistance Meter 3 An LED corresponding to the measurement s order of magnitude will be energized Measuring 9580 in Auto Measuring 9580 in Auto Ohms Mode Exponential Mode MANUALRES TANCE CO FACTION RANGE SE ESTIN 1 ELECT RECord amp 10 Volts HOLD Indicates RECord amp 10 Volts HOLD Indicates Ohms Range Test Voltage Measurement Ohms Range Test Voltage Measurement Indicators is Complete Indicators is Complete Figure 10 Comparing PRS 812 Display in Automatic Ohms Mode and Automatic Exponential Mode after the same low resistance measurement F Measurements from 1 0x10 to less than 1 0x10 ohms 1 When the resistance measurement is greater than 1 0x10 ohms test voltage will automatically be increased to 10 v
14. ISTANCE RANGE SELECTION using the UP 1 and DOWN J arrow keys a Range selection is made in one decade increments and indicated with colored LED s b Forresistance ranges below E3 use the LCD displayed decimal point as a guide for set ting the desired decade The 3 LED will be illuminated Rev C January 2012 27 PRS 812 Resistance Meter 5 Set test voltage by pressing MANUAL SELECT TEST VOLTS button until the desired voltage is displayed in lower right portion of LCD i e 10 10 or 100 Volts MANUAL Test Voltage amp Re sistance Limits are defined below IMPORTANT Exceeding these limits may affect measurement accuracy 10V 0 1 to lt 1 0x10 ohms 0 10 lt 100KQ 10V 1 0x10 to 1 0x10 ohms 1KQ lt 1GQ 100V 2 0x10 to 2 0x10 ohms 200KQ 200TQ NOTE If a test voltage is not manually selected test voltage control will default to Automatic Mode limits switching higher or lower in accordance with resistance range selection 6 Press TEST to begin the Measurement Test Cycle a The instrument will 1 Apply and display the selected Test Voltage or automatically default to and display the appropriate voltage for the selected resistance decade 2 Self adjust the measurement resistance range to the selected decade 3 Start the electrification period timer b If resistance is within the selected decade the measurement and the electrification time will be displayed continuously in
15. MANUAL selects initial test voltage MANUAL Test Voltage amp Resistance Limits are as follows lt 10V 0 1 to lt 1 0E 050 0 10 lt 100KQ 10V 1 0E 03 to lt 1 0E 090 1KQ lt 1GQ 100V 2 0E 05 to lt 2 0E 140 200KO lt 200TQ NOTE Optimal minium measurement in MANUAL using 100 volts is 2 0E 05 If REC is not displayed in the lower left corner of the LCD pressing RECORD RECALL once turns Memory Register ON REC will then be displayed in LCD If REC is ON and measurement data is stored in memory pressing RECORD RECALL once will provide access to the memory register Pressing RECORD RECALL successively will calculate and sequentially display Minimum MIN Maximum MAX and Average AVG of data stored in the Memory Register If memory is ON and register contains stored data pressing RECALL will provide the following information First Press RECALL Provides access to data in Memory NOTE MEM Xx Flashes in LCD indicating number of data points in the register and the last measurement is displayed Pressing DOWN J and UP 4 displays other data points and their respective position in the register is shown in the MEM XX section of the LCD Second Press RECALL Displays MIN Data Point in Memory Third Press RECALL Displays MAX Data Point in Memory NOTE When displayed OL Over Level indicates a measurement greater than gt 2 0x10 ohms which is beyond the measurement capability of the PRS 812 Fourth Press RECALL Dis
16. NUAL modes the instrument automatically controls volt age and resistance range based on resistance characteristics of materials being measured In the MANUAL mode the operator may select test voltage and and resistance range Note that the most efficient mode of operation in AUTOMATIC MANUAL for maximum battery life 6 Rev C January 2012 PRS 812 Resistance Meter 3 The PRS 812 displays resistance Measurements in several ways a 14 factory programmable LED s each representing one order of magnitude from 10 to gt 10 ohms LED s have three colors including GREEN RED YELLOW ORANGE NOTE The PRS 812 provides very accurate measurements up to 1 0x10 ohms and has the capability to display values up to 2 0x10 ohms However the user should be aware that accuracy degrades rapidly above 1 0x10 ohms b Thelarge Liquid Crystal Display LCD includes an analog 1 10 scale and X1 X10 and X100 multiplier indication for measurement in O KO MO GO and TO c Digital measurements are provided using integers and O KO MO GO TO indicators or in exponential format 1 0EXX with O TO indicators 4 The PRS 812 includes data logging storage capabilities for up to 80 data points when RECORD is selected The instrument will provide access to the memory register calculate and display Minimum Maximum and Average of all measurements in the instrument s memory whenever RECALL is selected ll Cautions amp Warn
17. RESISTANCE METER PRS 812 User Manual FJPROSTAT Table of Contents PROSTAT PRS 812 RESITANCE METER Ed E esee e e DINCTCTUTTRNN RN Battery Installation and Replacement Setup amp Calibration Instrument Operation Instrument Maintenance VIII Warranty Information mS General Specifications E Instrument Controls Copyright 2012 by Prostat Corporation All rights reserved Printed in the United States of America No part of this manual may be used or reproduced in any manner whatsoever without written permission For information contact Prostat Corporation 1072 Tower Lane Bensenville IL 60106 USA Prostat is the registered trademark of Prostat Corporation PRS 812 Resistance Meter I Introduction amp Description The PRS 812 Resistance Meter makes precision resistance measurements from 1023555759950 0 1 up to 1 0x10 ohms with an overall measurement tolerance of 596 It is capable of measuring up to 2 0x10 ohms with tolerance depending on proce NAP dures and conditions The PRS 812 s wide range and close tolerance make it the B ia ne ideal ESD Auditing instrument for measuring resistance to a variety of ESD and general industry specifications It is operated by programmed microprocessors that control the instrument s measurement process resistance auto ranging test voltage selection electrification periods and display functions It can be operated in either fully automatic or ma
18. SD STM9 1 Workstations Equipment ESD SP10 1 Production Aids amp Hand Tools Material Handling Containers Packaging ANSI ESD STM11 11 ANSI ESD STM11 12 amp ASTM 257 and Other ANSI 20 20 ESD Program Control Elements Note Additional fixtures and electrodes supplied separately are required for many of these mea surement 4 Rev C January 2012 PRS 812 Resistance Meter B PRS 812 Resistance Meter Components The PRS 812 Resistance Meter includes the following items 1 5 6 PRS 812 Resistance Meter Instrument with 2 each 9V alkaline batteries IMPORTANT NOTE Only use alkaline batteries for optimal performance Two 10 foot leads PRS 800LB amp PRS 800LR for general audit measurements up to 1 0x10 ohms One heavy duty black Bulldog clip PRS 801BC Two Metal Alligator Clips PSI 870MAC One Audit Test Bed PTB 915 One calibration shunt for low range adjustment PRS 801CC Optional accessories are available for the PRS 812 Resistance Meter Visit www prostatcorp com for additional information C PRS 812 Basic Description amp Functions The PRS 812 Resistance Meter has several test display and data logging functions 1 Rev C January 2012 The PRS 812 six basic measurement modes are described in the following table PRS 812 Resistance Meter DISPLAYED INDICA RESIST TEST TEST UNITS TION RANGE VOLTS FUNCTIONS AUTOMATIC 1 1 0EXX aire MS RESISTANCE RANGE Default INDQ
19. T to restart the Test Cycle d Repeat the RESET Resistance Range adjustment and TEST sequence until a stable measure ment is displayed K Resistance Measurements in the AUTOMATIC MANUAL MODE of OPERATION To select AUTOMATIC MANUAL in either Exponential Mode 5 or Ohms Mode 6 Display use the FUNCTION MODE button to toggle through choices AUTOMATIC MANUAL is used for a variety of applications where one desires to reduce Measurement Test Cycle time by overriding Automatic reset to minimum functions It is intended for applications where gt Multiple Measurements where magnitude is expected within a range of two or three de cades and test voltage must vary with actual resistance measurements gt When AUTOMATIC electrification period and Test Voltage control must be maintained to current industry and Automatic Mode settings This mode prevents the PRS 812 from resetting the Test Voltage and Resistance Range to Mini mum at the beginning of each Measurement Test Cycle In this mode measurements start at the resistance range selected by the operator and its commensurate Test Voltage or the value of the last measurement Otherwise it is used similar to the AUTOMATIC Mode The following summarizes AUTOMATIC MANUAL Mode Operations and assumes that test leads are properly connected 1 Slide Battery Buss Cut Off switch to ON position 2 Press Red ON OFF button once to power up the instrument 3 Select AUTOMATIC MANUAL MODE by pressing
20. TQA AUTO AUTO ao TEST VOLTS ELECTRIFICATION m DISPLAY HOLD AUTOMATIC 2 n5 AUTO AUTO AUTO SEE TABLE NOTE 1 1 OEXX MAN or MANUAL 1 f MANUAL MAN AUTO TEST ONLY NO DISPLAY HOLD IND O TO UL UNDER DECADE LEVEL m OL OVER DECADE LEVEL MANUAL 2 ORMS MANUAL MAN AUTO Q TO SEE TABLE NOTE 2 MANUAL LOEXX iu i e MANUAL SETUP STARTING AUTOMATIC 1 IND O TO DECADE AUTO ADJUST RANGE Run TEST VOLTS ELECTRIFICATION DISPLAY HOLD MANUAL oms AUTO amp MAN Start AUTOMATIC panis MANUAL AUTO AUTO 7 Run SEE TABLE NOTE 3 TABLE NOTES 1 AUTOMATIC RESISTANCE RANGES IN AUTO 0 10 TO 2 0E 120 as follows lt 10V 0 1 TO lt 1 0E 040 0 10 lt 10KQ 10V 1 0E 04 TO lt 1 0E 06Q 10KO lt 1MQ 100V 1 0E 06 TO 2 0E 120 1MO lt 200TQ See Note Below 2 MANUAL RESISTANCE RANGES IN MAN 0 10 TO 2 0E 120 as follows lt 10V 0 1 TO lt 1 0E 059 0 10 lt 100KQ 10V 1 0E 03 TO lt 1 0E 090 1KQ lt 1GQ 100V 2 0E 05 TO 2 0E 120 200KQ lt 200TQ See Note Below 3 AUTO MANUAL Same as AUTOMATIC RESISTANCE RANGES IN AUTO MANUAL 0 10 TO lt 2 0E 120 as follows lt 10V 0 1 TO lt 1 0E 040 0 10 lt 10KQ 10V 1 0E 04 TO lt 1 0E 06Q 10KO lt 1MQ 100V 1 0E 06 TO 2 0E 120 1MO lt 200TQ See Note Below 2 The PRS 812 provides three separate test voltages for resistance measurements as indicated in the table above lt 10 Volts 10 Volts 100 Volts In AUTOMATIC and AUTOMATIC MA
21. ce to replace the discarded data point d When in any operation mode and HOLD is not displayed pressing CLEAR will erase all data stored in the Memory Register Pressing OFF will disble the REC mode and the instrument will be de energized When powered up again the REC mode will remain disabled until RECORD RE CALL is pressed once Turns instrument ON for normal operations performs functional amp Battery tests turns instrument OFF Displays GOOD on LCD if battery provides acceptable voltage for accurate measurements or displays Lo if unacceptable and batteries require replace ment Saves measurement and prepares instrument for next test cycle i e enters measurement into Memory Register if REC is ON and clears HOLD and the LCD display between measurements Begins measurement sequence in accordance with selected mode Battery buss cut off switch is used to isolate the main batteries from the instrument s circuit during battery change instrument storage and transport Rev C January 2012 PRS 812 Resistance Meter CAUTION Switch battery buss to the OFF position before changing batteries to avoid re verse polarity damage to the instrument LCD DISPLAY ELEMENTS 11 Colored LED s 14 LED s across the top of the PRS 812 indicate measurement order of mag nitude in decades from 10 to gt 10 ohms NOTE The PRS 812 provides very accurate measurements up to 1 0x10 ohms and has the capability to ind
22. e Warranty Exclusions THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU OF ALL OTHER PRODUCT WARRANTIES EXPRESS AND IMPLIED INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH ARE SPECIFICALLY DISCLAIMED The express warranty will not ap ply to defects or damage due to accidents neglect misuse alterations operator error or failure to properly maintain clean or repair products Limit of Liability in no event will Prostat or any seller be responsible or liable for special incidental or consequential losses or damages under any legal theory including but not limited to contract negligence or strict liability Fulfillment by Prostat of its express warranty obligations described above will be purchaser s exclu sive remedy and will be Prostat s and seller s limit of liability for any breach of warranty or other wise B Shipping of Warranty Returns 32 1 Obtain a Return Materials Authorization RMA number and shipping address from Prostat customer service Pack the instrument carefully and ship it prepaid and insured to the proper destination provided by Prostat s customer service department 2 For detailed shipping instructions and Return Materials Authorization RMA contact Rev C January 2012 PRS 812 Resistance Meter Prostat Corporation 1072 Tower Lane Bensenville IL 60106 Telephone 630 238 8883 or 855 782 8421 Website prostatcorp com rma C Shipping Non Warranty Items 1 Any Prostat p
23. ectrical equipment to prevent electromagnetic interference 4 Ifgroundable fixtures are employed for material measurements and when using 10 foot leads attach an auxiliary lead from the fixture to an ESD safe earth ground 5 Priorto making precision measurements allow the PRS 812 to warm up for 3 minutes then perform the Low Resistance Calibration procedure If several measurements are to be made periodically check the instrument s calibration using the supplied calibration shunt C Operation in AUTOMATIC Modes The PRS 812 was designed to simplify measurement standards and general rules for making wide range resistance measurements The PRS 812 s AUTOMATIC mode controls the critical aspects of Test Voltage Resistance Range and Electrification Period to meet ESDA Standard ANSI ESD STM11 11 Surface Resistance and other requirements Most measurements can be performed in AUTOMATIC which has two function modes 22 Rev C January 2012 PRS 812 Resistance Meter AUTO Mode 1 Auto Exponential Display 1 0EXX plus O indicators AUTO Mode 2 Auto Display in O KO MO GO and TO indicators AUTO Mode 1 is the default functional mode when the PRS 812 is powered up To change to AUTO Mode 2 simply press the MODE button once The AUTOMATIC modes are used in measurements where the following attributes are desired Automatic Test Voltage selection and control from 0 01 to 100 volts Automatic resistance scale control from 0 1
24. ects are minimized by instrument and test lead design However good measurement practices should be exercised at all times to ensure accuracy and repeatability Follow the recommendations below to obtain optimal performance from the PRS 812 1 Instrument handling and preparation a Do not drop or cause mechanical shock to your instrument b Store the instrument in a clean dry environment Do not expose the instrument to wet extremely hot or cold conditions c If the unit is stored in a cold environment allow it to stabilize at room temperature before powering up the unit d Be sure fresh batteries are installed when beginning an extensive measurement sequence Periodically check the condition of your alkaline batteries by pressing BATT TEST If Lo is indicated replace your batteries OPERATIONAL NOTE Low voltage Batteries will affect measurement accuracy e When making resistance measurements below 10 ohms perform The Low Range Calibra tion Procedure Repeat the procedure to confirm the instrument s response f Duringresistance measurements stand back away from the instrument to avoid body capacitance or fields from effecting instrument accuracy g To avoid body fields from interfering with instrument accuracy wear a wrist strap attached to a tested ESD ground to dissipate body charges Rev C January 2012 21 PRS 812 Resistance Meter WARNING To prevent electrical shock Do Not Touch energized circui
25. ent use Not intended for continuous use or production applications Rev C January 2012 PRS 812 Resistance Meter PRS 812 Instrument Controls FUNCTION MODE Toggles Through Six 6 Operation Modes DISPLAYED INDICA RESIST TEST TEST UNITS TION RANGE VOLTS FUNCTIONS AUTOMATIC 1 1 0EXX auo AUTOMATIC RESISTANCE RANGE Default IND Q TO AUTO RUTO ao TEST VOLTS ELECTRIFICATION DUME DISPLAY HOLD AUTOMATIC 2 Q TO AUTO AUTO AUTO SEE TABLE NOTE 1 1 0EXX MAN or MANUAL 1 MANUAL MAN AUTO TEST ONLY NO DISPLAY HOLD IND O TO UL UNDER DECADE LEVEL Te OL OVER DECADE LEVEL MANUAL 2 OHMS MANUAL MAN AUTO Q TO SEE TABLE NOTE 2 MANUAL LOEXX prie es e T MANUAL SETUP STARTING AUTOMATIC 1 IND O TO DECADE AUTO ADJUST RANGE Run TEST VOLTS ELECTRIFICATION DISPLAY HOLD MANUAL Bane AUTO amp MAN Start ATOMACA ipis MANUAL AUTO AUTO E Run SEE TABLE NOTE 3 TABLE NOTES 1 AUTOMATIC RESISTANCE RANGES IN AUTO 0 10 TO lt 2 0E 120 as follows lt 10V 0 1 TO 1 0E 040 0 10 lt 10K0 10V 1 0E 04 TO lt 1 0E 060 10Ko lt 1MQ 0100V 1 0E 06 TO 2 0E 120 1Mo 200TO See Note Below H2 MANUAL RESISTANCE RANGES IN MAN 0 10 TO 2 0E 120 as follows lt 10V 0 1 TO lt 1 0E 050 0 10 100Ko0 10V 1 0E 03 TO lt 1 0E 090 1Ko 1Go 0100V 2 0E 05 TO 2 0E 120 200Ko 200TQ See Note Below 3 AUTO MANUAL Same as AUTOMATIC RESISTANCE RANGES IN AUTO MANUAL 0 10 TO lt 2 0E 120 as fo
26. eter 10 333458728 910111212 10 12 FUNCTION RANGE SELECTION SELECT m E3 3 5 9 Figure 2 PRS 812 Controls amp Display Indicators 3 MANUAL displays data in exponential format 1 0EXX 4 MANUAL displays data in Q KO MO GO and TO In MANUAL the operator selects resistance range in single decade increments Test voltage may be selected by the operator or allowed to function automatically based on resistance range selected The operator determines electrification period in seconds SEC using the displayed timer in the center of the LCD 5 AUTO MANUAL displays data in exponential format 1 0EXX 6 AUTO MANUAL displays data in O KO MO GO and TO In AUTO MANUAL the operator may select the initial resistance range in decade increments Once set the PRS 812 starts the measurement process from the preset resistance decade rather than re zeroing itself for each measurement This feature saves measurement cycle time and extends battery life In this mode the instrument automatically controls test voltage range and measurement electrification period Rev C January 2012 2 RESISTANCE RANGE SELECTION 3 TEST VOLTS 4 RECORD RECALL Rev C January 2012 PRS 812 Resistance Meter Two Triangular Arrows Buttons UP 1 and DOWN 4L select Resistance Measurement Range in single orders of magnitude while in MANUAL or AUTOMATIC MANUAL modes Manual Selection of 10 10 or 100 volts in
27. icate values up to 2 0x10 ohms However the user should be aware that accuracy degrades rapidly above 1 0x10 ohms 12 PRS 812 Liquid Crystal Display LCD Elements AUTO When ON Indicates instrument in AUTOMATIC mode MANUAL When ON indicates instrument in MANUAL mode When AUTO and MANUAL are ON indicates instrument is in AUTO MANUAL mode eee p MEM g SEC 2 5 00 00 REC 2 KO MQ GO TO lt 100 V HOLD Ee Analog Scale amp X100 Indicator The one decade analog scale elements darken to indicate measurement in teger X1 X10 or X100 darken to indicate the scale multiplier Combine the Analog indicators with O KO MO GO and TO symbols to obtain an analog measurement MEM 00 Provides the number of data points stored in the Memory Register when REC is ON and instrument is RESET in preparation for a new measurement The Memory Register can store up to 80 data points Also identifies a displayed data point s position in the Memory Register when in the RECALL mode 00 SEC Display s electrification period required for the measurement when in TEST during AUTOMATIC and AUTO MANUAL measurement modes In MANUAL provides continuous measurement timing up to 99 seconds then restarts at 0 seconds Rev C January 2012 13 PRS 812 Resistance Meter 14 MIN MAX AVG REC KQ MO GO TO 100 V HOLD PRS 812 Connections Positive Terminal Negative Terminal Displayed when RECALL butto
28. imate Range Tolerances 1 0E 1 to 1 0E 1 ohms 5 Corrected for Test Lead Resistance 1 0E 1 to 1 0E 12 ohms 2 0 with 10 foot Test Leads 1 0E 12 to 2 0E 14 ohms gt 40 Multi function 2 5 8 x 1 5 8 Liquid Crystal Display with 0 5 digit height Displays 3 1 2 digits in Ohms or 1 0EXX in exponential format Ohms Display indicators O KO MO GO and TO Includes 19 segment analog scale 1 10 with 0 5 indication with x1 x10 amp x100 multipliers Number of Data Points in Memory 0 80 Automatic Electrification Time sec onds or Time required to Manually obtain steady state measurement Displays data HOLD BATTERY status MIN MAX AVG REC and Test Voltage 10 10 or 100 V 14 Color LED s from 10 to 10 ohms Colors are RED GREEN YELLOW ORANGE or Blank OFF Times measurements In Seconds up to 99 seconds Displayed on LCD Register stores up to 80 data points MEM Displayed after RESET Response from gt 0 1 to 1 0E06 Ohms 2 0 seconds Average Measurement Period from 0 1 ohms to 1 0E12 Ohms 2 5 Seconds Calcu lated Electrification Period per ANSI ESD STM11 11 7 5 second 0 1 ohms to 10E 12 Ohms Programmed Electrification gt 1 0E 12 Ohms 15 0 seconds Two 9 VDC alkaline batteries Nominal battery life 25 hours in AUTOMATIC mode approxi mately 40 hours in AUTOMATIC MANUAL mode 4 0 wide x 6 0 long x 2 0 deep 22 ounces with batteries lt 4mA 100 Volts Designed for Intermitt
29. ings As with any electrical device use proper safety precautions and safe measurement procedures to avoid personnel shock and arc discharge A The PRS 812 Resistance Meter is battery operated and delivers test voltages up to 100 volts IMPORTANT Only use alkaline batteries in the PRS 812 B The instrument is current limited for safety however if improperly used it may be capable of deliv ering an annoying shock to a person touching conductors energized by the PRS 812 particularly at 100 volts C While current limited a hazard exists in personnel reaction to a potential shock D To avoid personnel shock follow the General Operations instructions at all times Do not touch energized electrodes or fixtures when power is applied except as specifically described in this and accessory instructions E Do not operate or store the instrument in damp environments or wet conditions Rev C January 2012 7 PRS 812 Resistance Meter CAUTION Storage or use of this instrument in high humidity damp or wet conditions may cause damage to the instrument s electronic circuits effect performance and can increase the possibility of personnel shock or arc discharge F Do not use the PRS 812 in combustible or explosive environments WARNING Improper handling and use of energized circuits may cause arc discharge which in turn may cause the ignition of combustible materials or fumes Do not use exposed energized circuits in
30. istics of the materials under test based on 1 Test voltage and 2 Current flow Test Voltage is reset to lt 10V and automatically increased in accordance with the following material resistance characteristics 1 lt 10 Volts 0 1 to less than 1 0x10 ohms 0 10 lt 10KQ 2 10 Volts 1 0x10 to less than 1 0x10 ohms 10KQ lt 1MQ 3 100 Volts 1 0x105 to 2 0x10 ohms 1MQ 200TO 4 When OL is displayed it mean that the resistance is greater than 2 0x10 ohms Electrification period i e the time period during which test voltage is applied to the ma terial under test is automatically adjusted to the PRS 812 s measurement characteristics and industry standards ANSI ESD STM11 11 Typical electrification periods are 1 2 to 3 Seconds 0 1 to less than 1 0x10 ohms 0 10 lt 10KQ 2 2 to 4 Seconds 1 0x10 to less than 1 0x10 ohms 10KQ lt 1MQ 3 7 to 8 Seconds 1 0x10 to 1 0x10 ohms 1MQ gt 1TQ 4 15 Seconds 1 0x10 to 2 0x10 ohms 1TO 200TO Rev C January 2012 19 PRS 812 Resistance Meter 20 8 When the PRS 812 displays and holds the final resistance measurement HOLD is indicated in the lower right corner of the LCD The PRS 812 is processor controlled to obtain hundreds of measurements per second and to make rapid adjustments in resistance range and test voltage as necessary It will display the resistance measurement of the material under test based on the following cri
31. llows lt 10V 0 1 TO 1 0E 040 0 10 lt 10KQ 0 10V 1 0E 04 TO lt 1 0E 060 10Ko lt 1MQ 100V 1 0E 06 TO 2 0E 120 1Ma lt 200TQ See Note Below NOTE It is capable of measuring up to 2 0x10 ohms with tolerance depending on procedures and conditions Resistance 2 Triangular button Arrows UP 7 and DOWN 4 Select Resistance Range Select Range in single decades in Manual and Automatic Manual modes Test Volts Manual Selection of 10 10 or 100 volts in Manual Mode Record Recall Turns Memory Register ON if OFF Provides access to all data in Memory Regis Rev C January 2012 35 PRS 812 Resistance Meter ter Calculates and Displays Minimum Maximum and Average of data stored in Memory Register Clear Erases data in Memory Register if in HOLD mode discards most recent Held Value ON OFF Power up perform functional amp Battery tests Power down if ON Batt Test Displays GOOD on LCD if acceptable voltage or Lo if unacceptable Reset Enters saves data into Memory Register Clears HOLD and Display Test Begins measurement sequence Battery Buss ON OFF Switch isolates batteries from instrument circuits for storage amp Cut Off transport 36 Rev C January 2012 Rev C January 2012 NOTES PRS 812 Resistance Meter 37 PRS 812 Resistance Meter NOTES 38 Rev C January 2012 Specifications are subject to change without notice All Prostat trademarks and trade names are the propert
32. mory Register NOTE REC must be displayed in the lower left corner of the LCD in order to enter the measurement in the Memory Register If REC is not displayed press RECORD RECALL once then press RESET to save the data b Increases LCD displayed number of data points in the Memory Register MEM by one e g MEM 02 c Returns the PRS 812 to its last function mode in preparation for the next measurement 10 To make several measurements simply press TEST to obtain the next measurement and then RESET to save it Repeat the TEST and RESET process for each measurement Rev C January 2012 PRS 812 Resistance Meter NOTE Be sure to press RESET after your last measurement to save it in your Memory Register before turning the PRS 812 OFF If the instrument is turned OFF before pressing RESET the last measurement will be lost Good Measurement Practices specific Operational Procedures and descriptions of functional modes are covered in detail below B Good Measurement Practices Several factors will affect precision resistance measurements Most practitioners are aware of the importance of using care when handling instruments proper use of connections lead resistance grounding and the impact of electrical or electrostatic fields on their equipment As with most very precise instruments the PRS 812 circuits and its cables are sensitive to the ef fects of electromagnetic and electrostatic fields These eff
33. n is pushed second time while in REC mode Number displayed when MIN is indicated is the Minimum data value in Memory Register Displayed when RECALL button is pushed a third time sequentially in REC mode Number displayed when MAX is indicated is the Maximum data value in Memory Register Displayed when RECALL button is pushed the fourth time sequentially in REC mode Number displayed when AVG is indicated is the Average of all data values in Memory Register that are less than 2 0x10 ohms OL s are not included in averaging calculation Note Either the RECALL button must be depressed a fifth time or RESET pressed to return the system to its operational measurement mode Indicates that the Memory Register is ON and is Recording data each time the RESET button is depressed after a TEST measurement Ohms Indicates measurement between 0 1 and 999 ohms Indicates measurements from 1 000 1 0x10 to 990 000 9 9x10 ohms Indicates measurements from 1 000 000 1 0x105 to 999 000 000 9 9x10 ohms Indicates measurements from 1 000 000 000 1 0x10 to 999 000 000 000 9 9x107 ohms Indicates measurements from 1 000 000 000 000 1 0x10 to 200 000 000 000 000 2 0x10 ohms Indicates 10 10 or 100 volts being applied as the test voltage Indicates measurement is complete at the end of a TEST cycle Holds data point in display until instrument is RESET or CLEAR is depressed Battery indication for low voltage Power
34. normal operations from the RECORD RECALL mode at any time by pressing RESET b 2nd Press RECORD RECALL LCD Displays MIN and the lowest recorded resistance value saved in the Memory Register c 3rd Press RECORD RECALL Displays MAX and the highest recorded resistance value saved in the Memory Register NOTE When displayed OL Over Level indicates a measurement greater than gt 2 0x10 ohms beyond the measurement capability of the PRS 812 d 4th Press RECORD RECALL Displays AVG and the average of all recorded resistance values saved in the Memory Register NOTE OL Over Level measurements greater than gt 2 0x10 ohms are not included in displayed average AVG calculation AVG is the calculated average of all resis tance values less than lt 2 0x10 ohms rounded to the first decimal point e 5th Press RECORD RECALL Returns PRS 812 System to normal operations NOTE If RECALL is not pressed a fifth time OOPS will be displayed in the LCD when TEST is next pressed To Clear OOPS press RESET The instrument will return to normal operations VII Instrument Maintenance A Calibration amp Repair 1 Instrument Calibration should be performed annually 2 Only Prostat Corporation or their authorized instrument laboratory should perform PRS 812 calibration or repair 3 Before shipping your instrument to Prostat Corporation for service contact Prostat calibration amp customer ser
35. nt within 2 5 seconds up to 1 0x10 ohms depending on material characteristics An additional 5 0 seconds of electrification is applied in accordance with ESD Association S11 11 Surface Resistance Standard 3 Oncea stable measurement is confirmed and displayed by the instrument HOLD will be ener gized in the LCD and the electrification timer will stop 4 AnLED corresponding to the measurement s order of magnitude will be energized H Measurements from 1 0x10 to 2 0x10 ohms 1 When the resistance measurement is greater than 1 0x10 ohms the test voltage will remain at 100 volts and the instrument will continue to automatically adjust the resistance range 2 The instrument s ELECTRIFICATION PERIOD is extended to a minimum of 15 seconds Typically a stable measurement will be obtained in 15 0 to 20 0 seconds 26 Rev C January 2012 PRS 812 Resistance Meter 3 Once a stable measurement is confirmed and displayed by the instrument HOLD will be dis played in the LCD and the electrification timer will stop NOTE The PRS 812 provides very accurate measurements up to 1 0x10 ohms and has the capability to display values up to 2 0x10 ohms However the user should be aware that accuracy degrades rapidly above 1 0x10 ohms Errors above 1 0x10 ohms depends on the user s procedures and environment 4 AnLED corresponding to the measurement s order of magnitude will be energized l Measurements Greater
36. nual modes or a combination of automatic and manual modes The PRS 812 is unique in that it records and stores up to 80 resistance measure ments in its own non volatile memory register Stored data is summarized with a push of a button Its accuracy is based on its ability to rapidly make several measurements each second and average them until a stable set of eight measurements all within 596 tolerance are obtained The final averaged data is displayed as the resis tance measurement Typically measurements at less than 1 ohm are within 5 of tolerance and those between 1 0 and 1 0x10 ohms are within 0 596 of laboratory references Figure 1 PRS 812 during power up While quite sophisticated in design the PRS 812 Resistance Meter is easy to use and extremely helpful in making accurate ESD auditing measurements or general resistance and continuity checks CAUTION To avoid electrical shock or damage to the PRS 812 Resistance Meter read this manual completely before installing batteries or using the instrument A Measurement Applications The PRS 812 Resistance Meter is designed to measure resistance characteristics of electrostatic discharge ESD control materials and products to current ESD industry standards including Wrist Straps ANSI ESD S1 1 Garments ESD STM2 1 Flooring ANSI ESD STM7 1 Worksurfaces ANSI ESD S4 1 ESD CP Grounds ANSI ESD S6 1 Carts amp Seating ANSI ESD STM 12 1 Footwear ANSI E
37. olts and the resistance range will be adjusted as necessary 2 Astable resistance measurement will be obtained within 2 0 to 4 0 seconds 3 Oncea stable measurement is confirmed and displayed HOLD will be energized in the LCD and the electrification timer will stop Electrification Remains 2 0 3 0 sec on Measurements lt 1 0E 06 Ohms MANUAL RESIST SE MANUAL FUNCT A A RANGE SELECT n SELECT Note KO est Voltage Automati Indicator cally shifts to 10 V 1 0E 04 Ohms Figure 11 Test Voltage at 10 Volts from 1 0E 04 to lt 1 0E 06 Ohms in Auto Rev C January 2012 25 PRS 812 Resistance Meter 4 AnLED indicating the measurement s order of magnitude will be energized G Measurements from 1 0x10 to less than 1 0x10 ohms 1 When the resistance measurement is greater than 1 0x10 ohms the test voltage will automati cally be increased to 100 volts and electrification Test Period is automatically adjusted to gt 7 5 seconds 2 Unless there are variations in the material or object being measured a stable resistance mea surement will be obtained in approximately 8 0 seconds Electrification Period Automatically shifts to 8 0 sec 1 0E 06 Ohms E06 LEBg 34 EEEE EB Gad Note MO est Voltage Automatically shifts to 100 V 1 0E 06 Ohms Figure 12 Test Voltage at 100 Volts from 1 0E 06 to 1 0E 14 Ohms in Auto NOTE The PRS 812 can obtain an accurate resistance measureme
38. plays AVG of all Memory Data Points NOTE OL Over Level measurements gt 2 0x10 ohms are not included in displayed average AVG calculation Fifth Press RECALL Returns System to normal operations NOTE Ifin RECALL mode pressing RESET will return the instrument to normal measurement operations 11 PRS 812 Resistance Meter 12 NOTE If RECALL is not pressed a fifth time OOPS will be displayed in the LCD when TEST is next pressed To Clear OOPS press RESET The instrument will return to normal operations 5 CLEAR In normal operations CLEAR erases data in Memory Register discards most recent measurement or turns the REC function OFF as follows a When in any operation mode and HOLD is not displayed pressing CLEAR will erase all data stored in Memory NOTE The process of turning the REC function OFF will clear the Memory Register of all stored data Be sure that this is indeed desirable before pressing the CLEAR button 6 ON OFF 7 BATT TEST 8 RESET 9 TEST 10 BATTERY BUSS CUT OFF b If a measurement is displayed in HOLD prior to pressing RESET buton pushing CLEAR will discard that held value and will not enter it into Memory Other data in Memory Register remains intact c If reviewing data in the Memory Register while in the RECALL mode pressing CLEAR will discard the displayed data point Other data in Memory Register remains intact and indexes down one spa
39. roduct returned for non warranty repair or calibration requires a Return Materials Authorization RMA number and should be packaged and shipped as described above and as directed by Prostat s customer service department 2 The following information must be included with the returned product a Description of the problem b Customer s Purchase Order Number amp Prostat s Materials Authorization RMA number c Name telephone number and fax number of individual contact who can provide more information regarding the problem and related application s d Complete return address Rev C January 2012 33 PRS 812 Resistance Meter PRS 812 Resistance System Specifications Range Test Voltages Normal Accuracy Display LED Indicators Timer Memory Response amp Electrification Power Dimensions Weight Open Circuit Current I Usage 34 Resistance from 0 1 1 0E 1 Ohms to 200 Tera ohms 1 0E 12 ohms Maximum resistance indication 200 Tera ohms 2 0E 14 ohms Automatic mode Default 0 01 to 10 volts Variable 1 0E 1 to 1 0E 4 Ohms Constant Voltage 10 volts 0 2 volts 1 0E 4 to 1 0E 6 Ohms At 10 amp 100 Volts 100 volts 2 0 volts 1 0E 6 to 2 0E 14 Ohms Manual Mode 0 01 to 10 volts Variable 1 0E 1 to 1 0E 4 Ohms 10 volts 0 2 volts 1 0E 3 to 1 0E 9 Ohms 100 volts lt 2 0 volts 2 0E 5 to 2 0E 14 Ohms Overall lt 5 at ambient conditions at 23 C and 30 Rh Approx
40. teria a A digital numeric display is the averaged result of eight 8 individual consecutive measurements each within 596 of each other The display is continuously recalculated and updated during the measurement s elec trification period The final displayed measurement is the averaged result of the last eight 8 individual consecutive measurements each within 596 at the end of the electrification period If the material or test conditions vary such that eight consecutive measurements each within 5 of each other cannot be obtained the PRS 812 will extend the electrifica tion period until the measurement criteria are met or The electrification period will automatically be terminated and the most recent aver aged result of eight 8 individual consecutive measurements will be displayed and held NOTE Several material measurements that vary greater than 15 to 20 percent of each other typically indicate inconsistencies in the material or test conditions In rare cases when a stable measurement cannot be obtained the display will reset NOTE When several held measurements vary greater than 15 to 20 percent of each other this typically indicates inconsistencies in the material or test conditions 9 To save the displayed measurement in the Memory Register and prepare the PRS 812 for the next measurement press the Yellow RESET button Pressing RESET causes three functions a Enters saves last measurement into Me
41. teries to the battery connection terminals 3 Position batteries in compartment with power leads neatly positioned above battery connec tions Carefully re install battery cover and locking screws NOTE Do Not change batteries with the battery buss ON Always switch Battery Buss Cut Off to OFF when changing batteries Should the ON OFF button be depressed during battery change and Battery Bus is ON the instrument may lock up and not function properly or be seriously dam aged In this case simply disconnect the batteries then re install with Battery Buss switch in the OFF position B Low Resistance Range 10 Ohms Calibration 1 Install the calibration shunt PRS 801CC across the Negative and Positive Lead Terminals Figure 5 below 16 Rev C January 2012 PRS 812 Resistance Meter NGESEEU T T m A PRS 812 Resistance Meter BO Figure 5 Low Resistance Range Calibration Shunt Installation 2 Press the Red ON OFF power button The instrument display should become energized each LED will be tested in sequence and GOOD will is displayed in the LCD if the batteries have sufficient test capacity figure 9 PRS 812 Resistar Meter Re i D Figure 6 Low Resistance Range Calibration Figure 7 Start the Calibration Sequence by using Reference Module Pressing RESET then CLEAR within 7 Second 3 Allow the instrument circuits to warm up for a few minutes approximately 2 3 minutes are
42. ts leads or fixtures while grounded Use pre tested ground connections meeting local safety codes for personnel earth grounding Refer to National Electrical Codes and ESD Association Standard S6 1 Grounding for information and procedures Only qualified personnel should conduct ground test measurements 2 Useonly Prostat test leads cables and accessories supplied with the PRS 812 Be sure that leads are properly connected to their respective terminals as described below a The 10 foot general measurement leads are custom made of high quality silicon rubber for maximum insulation properties and measurement accuracy These leads are intended for general measurements up to 10 ohm range Shielding is not incorporated in the 10 foot lead construction 1 When installed in the PRS 812 terminals be sure the right angle sheathed banana connections are fully inserted and positively seated for full terminal contact NOTE Do not apply excessive force when mounting leads on the terminals to prevent deformation or damage to the terminal circuit board 2 The straight retractable sheathed banana plugs are intended for connection to measurement electrodes fixtures or clip accessories 3 The red lead should be installaed in the positive 4 terminal and the black lead in the negative terminals 3 When making measurements in the manufacturing environment move the instrument and test leads away from power cables and heavy el
43. vice for a Return Material Authorization RMA tracking number by the follow ing means See WARRANTY INFORMATION below for further instructions Rev C January 2012 31 PRS 812 Resistance Meter B General Handling amp Maintenance VIII 1 Cleaning a Wipe case and LCD with clean low linting damp cloth b Do not use solvents for cleaning case or LCD 2 Handling a Store the instrument in a clean dry environment Do not expose the instrument to wet extremely hot or cold conditions b Do not drop or cause mechanical shock to your instrument c If the unit is stored in a cold environment allow it to stabilize at room temperature before powering up the unit d Remove batteries before storing the instrument for long periods e Be sure fresh alkaline batteries are installed when beginning an extensive measurement sequence Periodically check the condition of your batteries by pressing BATT TEST If Lo is indicated replace your batteries Warranty Information Prostat Corporation Warranty Prostat Corporation expressly warrants that for a period of one 1 year from the date of purchase that Prostat instruments will be free from defects in material parts and workmanship labor If Prostat receives notice of such defect during the warranty period Prostat will replace at its ex pense such parts that it determines to be defective Any defective part must be returned to Prostat postage prepaid with proof of purchase dat
44. y of Prostat Corporation All other trademarks and trade names are the property of their respective companies CARHIED BY PROFESSIONALS B PROFESSIONAL STATIC CONTROL PRODUCTS Prostat Corporation Corporate Headquarters 1072 Tower Lane e Bensenville IL 60106 630 238 8883 Fax 630 238 9717 1 855 STATIC1 www prostatcorp com

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